* Makefile.am (maintainer-check): Do not require SHELL=/bin/sh after $MAKE -e. * tests/ansi3.test, tests/ansi5.test, tests/cond22.test, tests/man2.test, tests/subobj3.test, tests/suffix8.test, tests/suffix11.test: Do not set SHELL=/bin/sh after $MAKE -e. $SHELL is overridden by tests/defs, so it won't hurt even if $MAKE -e uses the $SHELL envvar. * tests/ansi.test, tests/insh2.test, tests/texinfo.test, tests/texinfo8.test: Use SHELL=$SHELL, not SHELL=/bin/sh. Reported by Richard Dawe.